What is the difference between OPITO BOSIET and OPITO BOSIET-CA?

The main difference between OPITO BOSIET and OPITO BOSIET-CA is the inclusion of Compressed Air Emergency Breathing System (CA-EBS) training. BOSIET-CA adds a module that teaches offshore workers how to use a compressed air breathing device during helicopter underwater escape, while standard BOSIET uses a simpler hood-based EBS. The version you need depends entirely on the type of helicopter used in your offshore operations.

Below, we answer the most common questions about these two certifications so you can book the right course with confidence.

What does the ‘CA’ in BOSIET-CA stand for?

CA stands for Compressed Air. The BOSIET-CA certification includes training on a Compressed Air Emergency Breathing System, commonly referred to as CA-EBS. This is a small, portable breathing device that provides a short supply of compressed air to help a passenger escape from a submerged helicopter. The CA module is an additional practical component on top of the standard BOSIET content.

The CA-EBS device is worn or stored within reach during helicopter travel. In the event of a ditching or underwater impact, it gives the passenger extra time and breathable air to orient themselves and exit the aircraft safely. Training on this device requires hands-on practice in a pool environment, which is why it adds time and practical content to the course.

What are the main differences between BOSIET and BOSIET-CA?

The core content of both certifications is the same. Both cover offshore survival techniques, sea survival, firefighting awareness, helicopter safety, and Helicopter Underwater Escape Training (HUET). The key difference is that BOSIET-CA includes an additional practical module on using a compressed air breathing system during the underwater escape exercise.

Here is a side-by-side overview of what each certification includes:

• BOSIET: Sea survival, firefighting awareness, helicopter safety, HUET with hood-based EBS, first aid awareness
• BOSIET-CA: All of the above, plus a dedicated CA-EBS practical module using a compressed air device during the HUET exercise

In practical terms, the BOSIET-CA course takes slightly longer due to the additional training component. The CA-EBS module is a recognized OPITO standard and is increasingly required by operators who use helicopters fitted with or compatible with compressed air breathing systems.

Which certification do you need for your offshore role?

The certification you need depends on the helicopter type used to travel to your offshore location. If the helicopter used by your employer or operator is equipped for or requires CA-EBS use, you will need OPITO BOSIET-CA. If no compressed air breathing system is required, standard BOSIET is sufficient. Always check with your employer, crewing agent, or installation operator before booking.

As a general guide:

1. Ask your employer or project coordinator which helicopter type operates on your route
2. Confirm whether CA-EBS is mandatory for that aircraft or installation
3. Check any project-specific requirements listed in your mobilisation documentation
4. If in doubt, opt for BOSIET-CA, as it satisfies the requirements for both CA and non-CA environments

In many regions, particularly in the North Sea and other mature offshore basins, BOSIET-CA has become the standard expectation. Workers who hold BOSIET-CA are typically accepted in all environments where standard BOSIET would be valid, making it the more flexible option if you are unsure.

Can BOSIET be upgraded to BOSIET-CA?

Yes, in most cases a standard BOSIET certificate can be upgraded to BOSIET-CA without repeating the full course. OPITO allows for a CA-EBS top-up module that covers the compressed air practical component. This is a shorter course that adds the CA element to your existing certification without requiring you to redo sea survival or firefighting modules.

However, eligibility for a top-up depends on your current certificate being valid and meeting OPITO’s version and standard requirements. If your BOSIET is outdated or was completed under an older standard, a full BOSIET-CA course may be required instead. Check with your training provider to confirm which route applies to your specific certificate.

How long are BOSIET and BOSIET-CA certificates valid?

Both BOSIET and BOSIET-CA certificates are valid for four years from the date of completion. After four years, the certificate expires and must be renewed. Renewal is done through the FOET (Further Offshore Emergency Training) course, which refreshes the core competencies covered in the original BOSIET or BOSIET-CA.

It is important to track your expiry date carefully. Many offshore projects and operators will not mobilise workers with an expired or soon-to-expire certificate. Renewing before the certificate lapses avoids gaps in your eligibility and prevents last-minute delays to your deployment.

How FMTC Safety helps you choose and complete the right OPITO course

Choosing between BOSIET and BOSIET-CA does not need to be complicated. We offer both certifications at our training centers across the Netherlands, Belgium, France, the United States, Saudi Arabia and other strategic locations, most of them close to airports, ports and industry hubs so you can complete your training before heading to your project.

Here is what you can expect when booking with us:

• Certified OPITO courses including both BOSIET with CA-EBS and standard BOSIET options
• Guaranteed course dates, even with small groups, so you never face a last-minute cancellation
• Free cancellation or rescheduling up to 24 hours before the course starts
• Practical, experienced instructors who make the training clear and relevant
• Support for both individual workers and teams booking through HR or QHSE departments

Whether you are booking for yourself or coordinating training for a team, you can explore our full OPITO HUET, FOET and BOSIET courses overview to find the right option. If you are unsure which certification applies to your role or project, our team is happy to help. Contact us and we will point you in the right direction.